For veterinary medicines production enterprises. In the past in the majority with free-range farming mode. So, many enterprises in the design of the product sales channels, is looking for agents or distributors in different parts of the market to give priority to. But today's poultry market has changed, the past cage-free by some scale range, range gradually replaced a dragon, breeding group, etc. So, in order to ensure that product sales channels open. We need to adjust or redesign the sales channels.